linux-kernel - Re: FW: [PATCH] mtk-vcodec: fix some smatch warnings

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Date:   Mon, 24 Oct 2016 11:49:35 +0800
From:   Tiffany Lin <tiffany.lin@...iatek.com>
To:     Mauro Carvalho Chehab <mchehab@....samsung.com>
CC:     <daniel.thompson@...aro.org>,
        Hans Verkuil <hans.verkuil@...co.com>,
        "Rob Herring" <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Daniel Kurtz <djkurtz@...omium.org>,
        Pawel Osciak <posciak@...omium.org>,
        Eddie Huang <eddie.huang@...iatek.com>,
        Yingjoe Chen <yingjoe.chen@...iatek.com>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-media@...r.kernel.org>,
        <linux-mediatek@...ts.infradead.org>, <PoChun.Lin@...iatek.com>
Subject: Re: FW: [PATCH] mtk-vcodec: fix some smatch warnings



> Fix this bug:
> 	drivers/media/platform/mtk-vcodec/vdec_drv_if.c:38 vdec_if_init() info: ignoring unreachable code.
> 
> With is indeed a real problem that prevents the driver to work!
> 
> While here, also remove an used var, as reported by smatch:
> 
> 	drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c: In function 'mtk_vcodec_init_dec_pm':
> 	drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c:29:17: warning: variable 'dev' set but not used [-Wunused-but-set-variable]
> 	  struct device *dev;
> 	                 ^~~
> 
> Signed-off-by: Mauro Carvalho Chehab <mchehab@...pensource.com>

Acked-by: Tiffany Lin <tiffany.lin@...iatek.com>
> ---
>  drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c | 2 --
>  drivers/media/platform/mtk-vcodec/vdec_drv_if.c       | 1 +
>  2 files changed, 1 insertion(+), 2 deletions(-)
> 
> diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> index 18182f5676d8..79ca03ac449c 100644
> --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.c
> @@ -26,14 +26,12 @@ int mtk_vcodec_init_dec_pm(struct mtk_vcodec_dev *mtkdev)  {
>  	struct device_node *node;
>  	struct platform_device *pdev;
> -	struct device *dev;
>  	struct mtk_vcodec_pm *pm;
>  	int ret = 0;
>  
>  	pdev = mtkdev->plat_dev;
>  	pm = &mtkdev->pm;
>  	pm->mtkdev = mtkdev;
> -	dev = &pdev->dev;
>  	node = of_parse_phandle(pdev->dev.of_node, "mediatek,larb", 0);
>  	if (!node) {
>  		mtk_v4l2_err("of_parse_phandle mediatek,larb fail!"); diff --git a/drivers/media/platform/mtk-vcodec/vdec_drv_if.c b/drivers/media/platform/mtk-vcodec/vdec_drv_if.c
> index 3cb04ef45144..9813b2ffd5fa 100644
> --- a/drivers/media/platform/mtk-vcodec/vdec_drv_if.c
> +++ b/drivers/media/platform/mtk-vcodec/vdec_drv_if.c
> @@ -31,6 +31,7 @@ int vdec_if_init(struct mtk_vcodec_ctx *ctx, unsigned int fourcc)
>  	switch (fourcc) {
>  	case V4L2_PIX_FMT_H264:
>  	case V4L2_PIX_FMT_VP8:
> +		break;
>  	default:
>  		return -EINVAL;
>  	}
> --
> 2.7.4
> 
> --
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